{
  "manageEntity": {
    "action": "Save",
    "entityId": "624065",
    "entityType": "Track",
    "nonce": "0x2101d208f2507facb50ba3f8ab84143a05a58da00cf2bc120d624968f4b12639",
    "signature": "0x6643a367bb1a29ff1f791a9b8b6332f87fa71e741d0bf98c88439f4484002f1806bb89e3fa9a7f2457a6405dbe213281f605737957e00d0a1e839e4c63eb78c41b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}